Chicken Livers: Are yellowish ones OK?

My GF and I both love fried chicken livers. The hard part is finding good ones. My local grocery used to carry good quality frozen livers, but discontinued that a while back. They carry their own packaged livers, but it seems that most of the packages contain about 1/4 to 1/2 the livers that are very yellow in color, unlike the deep red that I prefer. My question is this: are the yellowish ones OK, or is there something (besides the color) that isn't right with them?